<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="提交审核"/>
    </el-steps>

    <el-button type="text" @click="openAddChapter">添加章节</el-button>
    <ul class="chapterList">             
        <li v-for="chapter in chapterVideoList" :key="chapter.id">
            <p>
                {{ chapter.title }}
        
                <span class="acts">
                    <el-button type="text" @click="openVideo(chapter.id)">添加小结</el-button></el-button>
                    <el-button type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="deleteChapter(chapter.id)">删除</el-button>
                </span>
                
            </p>
            <ul class="chapterList videoList">                                
                <li v-for="video in chapter.children" :key="video.id">
                   <p>
                       {{video.title}}
                    <span class="acts">
                        <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
                        <el-button type="text" @click="deleteVideo(video.id)">删除</el-button>
                    </span>
                   </p>
                </li>
            </ul>
        </li>
    </ul>


    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="colseSaveOrUpdate">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>


    
    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
        <el-form :model="video" label-width="120px">
            <el-form-item label="课时标题">
            <el-input v-model="video.title"/>
            </el-form-item>
            <el-form-item label="课时排序">
            <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
            </el-form-item>
            <el-form-item label="是否免费">
            <el-radio-group v-model="video.free">
                <el-radio :label="true">免费</el-radio>
                <el-radio :label="false">默认</el-radio>
            </el-radio-group>
            </el-form-item>

            <el-form-item label="上传视频">
                <el-upload
                    :on-success="handleVodUploadSuccess"
                    :on-remove="handleVodRemove"
                    :before-remove="beforeVodRemove"
                    :on-exceed="handleUploadExceed"
                    :file-list="fileList"
                    :action="BASE_API+'/vod/video/uploadAlyiVideo'"
                    :limit="1"
                    class="upload-demo">
                <el-button size="small" type="primary">上传视频</el-button>
                <el-tooltip placement="right-end">
                    <div slot="content">最大支持1G，<br>
                        支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                        GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                        MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                        SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
                    <i class="el-icon-question"/>
                </el-tooltip>
                </el-upload>
            </el-form-item>   

        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
            <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
        </div>
    </el-dialog>


     <el-form label-width="120px">
        <el-form-item>
            <el-button @click="previous">上一步</el-button>
            <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
        </el-form-item>
    </el-form> 
  </div>
  

</template>


<script>

import * as chapter from '@/api/edu/chapter'   

import * as video from '@/api/edu/video'   

export default {
    data(){
        return{
            saveBtnDisabled:false,
            saveVideoBtnDisabled:false,
            id:'',
            chapterVideoList:'',
            chapter:{
                title:'',
                sort:0,
            },
            dialogChapterFormVisible:false,
            dialogVideoFormVisible:false,
            video:{
                title:'',
                sort:0, 
                free:false,
                courseId:'',
                chapterId:'',
                videoSourceId:'',
                videoOriginalName:''
            },
            fileList:[],
            BASE_API:process.env.BASE_API
        }
    },
    created(){
        this.init();
        this.getChapterVideo();

    },
    methods:{
        next(){
            this.$router.push({path:'/course/publish/' + this.id})
        },
        previous(){
            this.$router.push({path:'/course/info/' + this.id})
        },
        init(){
            this.id = this.$route.params.id
            this.chapter.courseId  = this.id
        },
        //----------------章节操作----------------
        saveOrUpdate(){
            if(this.chapter.id == ""){
                this.addChapter()
            }else{
                this.updateChapter()
            }
        },
        getChapterVideo(){
            chapter.getAllChapterVideo(this.id)
                .then(response =>{
                   this.chapterVideoList = response.data.allChapterVideo
                   console.log(this.chapterVideoList)
                })
        },
        addChapter(){
            chapter.addChapter(this.chapter)
                .then(response =>{
                    this.dialogChapterFormVisible = false
                    this.$message({
                            type:'success',
                            message:'添加章节成功'
                    })
                    this.chapter.title = ""
                    this.chapter.sort = 0
                    this.getChapterVideo()
                })
        },
        updateChapter(){
            chapter.updateChapter(this.chapter)
                .then(response =>{
                    this.dialogChapterFormVisible = false
                    this.$message({
                            type:'success',
                            message:'修改章节成功'
                    })
                    this.chapter.title = ""
                    this.chapter.sort = 0
                    this.getChapterVideo()
                })      
        },
        openEditChapter(chapterId){
            chapter.getChapter(chapterId)
                .then(response =>{
                    this.chapter = response.data.eduChapter;
                    this.dialogChapterFormVisible = true
                })
        },
        openAddChapter(){
            this.chapter.title = ""
            this.chapter.sort = 0
            this.chapter.id = ""
            this.dialogChapterFormVisible = true
        },
        colseSaveOrUpdate(){
            this.dialogChapterFormVisible = false;
            this.chapter.title = ""
            this.chapter.sort = 0
            this.chapter.id = ""
        },
        deleteChapter(chapterId){
            this.$confirm('确定删除该条记录?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                    chapter.deleteChapter(chapterId)
                        .then(response =>{
                            this.getChapterVideo();
                            this.$message({
                            type: 'success',
                            message: '删除成功!'
                            });            
                        })  
                    })              
        },
        //--------------上传相关操作------------------
        handleVodUploadSuccess(response,file,fileList){//上传视频成功后调用的方法
            this.video.videoSourceId = response.data.videoId
            this.video.videoOriginalName = file.name           
        },
        handleUploadExceed(){//上传视频之前调用的方法

        },
        beforeVodRemove(file,fileList){//点击x调用的方法
            return this.$confirm(`确定移除 ${ file.name }？`);
        },
        handleVodRemove(file, fileList){//确认删除后调用的方法
            video.deleteAlyiVideo(this.video.videoSourceId)
                .then(response =>{
                    this.$message({
                    type: 'success',
                    message: '删除成功'
                    })
                })
            this.video.videoSourceId = '';
            this.video.videoOriginalName = '';
        },
        //---------------小结操作---------------------
        saveOrUpdateVideo(){
            if(this.video.id == ""){
                this.saveVideo();
            }else{
                this.updateVdieo();
            }
        },
        openVideo(chapterId){
            this.video = {
                id:'',
                title:'',
                sort:0, 
                free:false,
                courseId:this.id,
                chapterId:chapterId,
                videoSourceId:'',
                videoOriginalName:''
            }
            this.fileList = []
            this.dialogVideoFormVisible = true;
        },
        saveVideo(){
            video.addVideo(this.video)
                .then(response => {
                    this.dialogVideoFormVisible = false;
                    this.getChapterVideo();
                    this.$message({
                        type: 'success',
                        message: '添加章节成功!'
                    }); 
                })
        },
        openEditVideo(videoId){
            video.getVideo(videoId)
                .then(response =>{
                    this.dialogVideoFormVisible = true;
                    this.video = response.data.eduVideo
                    console.log(this.video)
                    if(this.video.videoOriginalName != ""){
                        this.fileList = [{
                            name:this.video.videoOriginalName,
                            url:""
                        }]
                    }
                   
                })
        },
        updateVdieo(){
            video.updateVideo(this.video)
                .then(response => {
                    this.dialogVideoFormVisible = false;
                    this.getChapterVideo();
                    this.$message({
                        type: 'success',
                        message: '更新章节成功!'
                    });
                })
        },
        deleteVideo(videoId){
            this.$confirm('确定删除该条记录?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(() => {
                    video.deleteVideo(videoId)
                        .then(response =>{
                            this.getChapterVideo();
                            this.$message({
                            type: 'success',
                            message: '删除成功!'
                            });            
                        })  
                    })              
        },



    }
}
</script>
<style scoped>
.chapterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chapterList li{
  position: relative;
}
.chapterList p{
  /* float: left; */
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chapterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
  
}
.videoList p{
  /* float: left; */
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>